diff --git a/.gitignore b/.gitignore
index 995dfdc..49d586a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,10 +10,12 @@ docs/pcbgcode.lot
 docs/pcbgcode.out
 docs/pcbgcode.toc
 
-*.b##
-*.s##
 ~$*.xlsx
 viewer/applet/data/optimize_me.txt
 viewer/**/optimize_me.txt
-*.b#1
 *.b#*
+.suo
+*.sln
+*.vcxproj
+*.filters
+*.user
\ No newline at end of file
diff --git a/pcb-gcode.ulp b/pcb-gcode.ulp
index dc99626..d2f9dc2 100644
--- a/pcb-gcode.ulp
+++ b/pcb-gcode.ulp
@@ -85,6 +85,7 @@ string g_cmd_temp;
 ////////// mlmSolutions added 29 Jan 14
 
 real m_v_x[], m_v_y[], m_v_rad[];
+real m_v_xc[], m_v_yc[]; // JJ
 real m_tool_x, m_tool_y, m_vx1, m_vy1, m_vx2, m_vy2, m_rad;
 int m_v_index[], m_v_prev[], m_v_next[], m_v_step[], m_v_cont[], m_v_curve[], m_c_start[], m_c_end[]; 
 int m_contours, m_cw, m_v_n=1, m_fwd, m_dist, m_dist_min, m_dist_min_index;
@@ -593,6 +594,8 @@ void spot_drill(UL_BOARD B)
 real m_arc_begin_x;
 real m_arc_begin_y;
 real m_arc_radius;
+real m_arc_center_x;
+real m_arc_center_y;
 int pair_count = 0;
 int MAX_COORDS_PER_LINE = 4;
 void device_draw(int x1, int y1, int x2, int y2, int state, real z_down_or_radius, real fr_xy, real fr_z)
@@ -710,9 +713,19 @@ void device_draw(int x1, int y1, int x2, int y2, int state, real z_down_or_radiu
 
 ////////// mlmSolutions 5 Feb 14
 
-		case ST_ARC:
-            i_coord = (rx2 - rx1) / 2;
-            j_coord = (ry2 - ry1) / 2;
+
+        case ST_ARC_CENTER:
+            sprintf(str, "ARC CENTER: rx1=%f, ry1=%f, rx2=%f, ry2=%f", rx1, ry1, rx2, ry2);
+            comm(str);
+            m_arc_center_x = rx1;
+            m_arc_center_y = ry1;
+            break;
+
+	case ST_ARC:
+            sprintf(str, "ARC: rx1=%f, ry1=%f, rx2=%f, ry2=%f, cx=%f, cy=%f", rx1, ry1, rx2, ry2, m_arc_center_x, m_arc_center_y);
+            comm(str);
+            i_coord = m_arc_center_x - rx1;
+            j_coord = m_arc_center_y - ry1;
 			if (m_z_up){
 				rz(DEFAULT_Z_UP);
 				rxy(rx1, ry1);
@@ -724,7 +737,7 @@ void device_draw(int x1, int y1, int x2, int y2, int state, real z_down_or_radiu
             else {
                 fccwr(rx2, ry2, i_coord, j_coord, fr_xy);
             }
-			break;
+            break;
 
 //////////
 	}
@@ -1026,6 +1039,8 @@ void output_mill_code()
 						// save arc data
 						m_v_x[m_v_n] = P.arc.x1;
 						m_v_y[m_v_n] = P.arc.y1;
+                        m_v_xc[m_v_n] = P.arc.xc;
+                        m_v_yc[m_v_n] = P.arc.yc;
 						m_v_rad[m_v_n] = P.arc.radius;
 						m_v_curve[m_v_n] = W.curve;
 						m_v_prev[m_v_n] = m_v_n - 1;
@@ -1036,6 +1051,8 @@ void output_mill_code()
 
 						m_v_x[m_v_n] = P.arc.x2;
 						m_v_y[m_v_n] = P.arc.y2;
+                        m_v_xc[m_v_n] = P.arc.xc;
+                        m_v_yc[m_v_n] = P.arc.yc;
 						m_v_rad[m_v_n] = P.arc.radius;
 						m_v_curve[m_v_n] = W.curve;
 						m_v_prev[m_v_n] = m_v_n - 1;
@@ -1143,6 +1160,7 @@ void output_mill_code()
 					if (m_v_rad[m_j] > 0) {	//its an arc
 						if ((m_j % 2) == 0) m_cw = false; else m_cw = true;	//if its the end of an Eagle arc, m_cw=false
 						m_rad = m_v_rad[m_j]; if (abs(m_v_curve[m_j]) >180) m_rad = m_rad * -1;
+                        device_draw(m_v_xc[m_j], m_v_yc[m_j], 0, 0, ST_ARC_CENTER, 0, 0, 0);
 						device_draw(m_vx1, m_vy1, m_vx2, m_vy2, ST_ARC, MILLING_DEPTH, FEED_RATE_MILL_XY, FEED_RATE_MILL_Z);
 					} else {	//its a line
 						device_draw(m_vx1, m_vy1, m_vx2, m_vy2, state, MILLING_DEPTH, FEED_RATE_MILL_XY, FEED_RATE_MILL_Z);
diff --git a/source/pcb-gcode.h b/source/pcb-gcode.h
index 870e5d0..61dc40d 100755
--- a/source/pcb-gcode.h
+++ b/source/pcb-gcode.h
@@ -46,13 +46,14 @@ enum { false = 0, true = 1 };
 
 enum { TASK_INVALID, TASK_OUTLINES, TASK_FILL };
 
-enum { ST_INVALID,
-       ST_START_LINE, ST_CONTINUE_LINE, ST_END_LINE,
-       ST_DRILL,
-       ST_FILL,
-		 ST_ARC_BEGIN,
-		 ST_ARC_END,
-		 ST_ARC};
+enum { 	ST_INVALID,
+       	ST_START_LINE, ST_CONTINUE_LINE, ST_END_LINE,
+       	ST_DRILL,
+       	ST_FILL,       
+	ST_ARC_BEGIN,
+	ST_ARC_END,
+    	ST_ARC,
+    	ST_ARC_CENTER};
 
 enum { TOP = 0, BOTTOM = 1, MILL = 2, TEXT = 3, STENCIL = 4, ALL = 5 };